SPOILERS ahead for Captain Marvel and Avengers: Infinity War.
Brie Larson has revealed that even she didn’t know what Captain Marvel’s post-credits scene was until the world premiere, even though she filmed it!
As reported by Digital Spy, Larson discussed on The Tonight Show Starring Jimmy Fallon the lengths that Marvel goes to protect the universe from spoilers or leaks, even from the actors and actresses in the scenes they are shooting.
“We filmed Endgame before Captain Marvel. We didn’t even have a script yet for Captain Marvel,” she remembered. “I flew to Atlanta to start shooting. I had no idea what I was doing, and I arrived and they gave me a piece of paper that was a full page of dialogue and action, but all of it was redacted except for my one line!”
Source: IGN.com Captain Marvel's Post-Credits Scene Was Kept a Secret Even From Brie Larson